Sample taking device



March 7,- 1933.

s. ROBI CHAUX SAMPLE TAKING DEVICE Filed Aug. 27, 1929 v Patented Mar. 7, 1933 UNITED STATES SOSTHENE BOBIGEAUX, F SARATOGA, TEXAS SAMPLE TAKING DEVICE Application filed August 27, 1929. Serial No. 388,882;

This invention relates to new and useful im rovements in a sample taking device.

Bne object of the invention 'is to provide a novel type of sample taking device whereby samples or specimens of the formation being pierced in well drilling may be taken from time to time and withdrawn to the groun surface for inspection.

Another object of the invention is to provide a novel combination of a drilling tool and stem for driving the same with a removable core. barrel therein, provided to rece ve a core or sample of the formation and wh1ch may be withdrawn from or let down intothe drill stem as drilling progresses wlthout withdrawing the stem and drilling tool. still further feature of the invention resides in the combination of a drill stem and drilling tool attached thereto with a core barrel so assem- 39 bled with said stem and tool as to exclude the drilling fluid from the core or samplebemg takenand to prevent the contamination of said sample by the drilling fluid.

With the above and other objects in view,

I the invention has particular relation to certain novel features of construction, operation and arrangement of parts an example of which is given in this speci cation and 1llusso trated in the accompanying drawing, where- Figure 1 shows a vertical sectional view of the device and Figure 2 shows a bottom end view. Referring now more particularly to the drawing wherein like numerals of reference designate similar parts in each of the figures, the numeral 1 designates a tubular drill stem and the numeral 2 designates a drilling tool of any desired form which is attached to the lower end of said stem, preferably by means of a tubular drill collar 3. The drilling tool has a central core receiving passageway 4 extending axially and the upper end of this passageway is enlarged forming the internal annular shoulders or seats 5, 6. The core receiving passageway 4 is surrounded by suitable core forming teeth 7 beneath the blades or other side cutters 8 of the drilling tool. There is a cylinder 9 whose lower end is threaded into the drilling tool and abuts the seat 6 and leading through this cylinder and on through the body of the drilling tool are the downwardly diverging water'channels 10. There is a tubular core barrel 11 whose lower end is adapted to seat on the seat 5 and above said lower end this core barrel carries the surrounding upwardly facing cup rings 12 which are secured on the core barrel and are held in spaced relation by means of the spacer rings 13, said cup rings and spacer rings forming, in effect, a plunger which is located beneath the water channels 10 when the core barrel is assembled with the drill stem and drilling tool for taking a core or sample. Within the lower end of the core barrel there is a suitable sample retainer which may consist of the flexible fingers 14 whose lower ends are secured in the barrel and whose upper ends converge inwardly to engage the core or sample in the barrel. Attached to the upper end of the core barrel, there is a valve cage 15 having the seat 16'therein and the outlet openings 17 above said seat. An upwardly opening ball valve 18 is confined by said cage and controls the passage of fluid through said seat. Upstanding from the cage 15 there is a rod 19 whose upper end has the conical shaped head 20. When it is desired to withdraw the core barrel, an overshot fishing tool of well known construction may be lowered into the drill stem and engaged with the head 20 and the core barrel then drawn out to the surface of the ground for an inspection of its contents.

When it is desired to lower the core barrel into the stem it may be dropped therein and the plunger thereon will enter the cylinder 9 and the pressure of the drilling fluid above will force said plunger on down through the cylinder 9 until the plunger seats against the shoulder 6 with the lower end of the core barrel seated against the shoulder 5. When thus seated the plunger will clear the open ends of the channels 10 and as drilling progresses the drilling fluid will pass out through said channels and back up around the drill stem to carry away the cuttings from the drilling tool but the cup rings 12 will exclude all of said drilling fluid from the core barrel and the sample therein and the lower end of the drilling tool will be working in the formation beneath the discharge ends of said channels 10 so that the drilling fluid will be excluded from the core being formed to the end that an uncontaminated core or sample may be obtained. In drilling as the core passes up into the barrel the valve 18 will lift to permit the escape through the outlet openings 17 of air or any water that may bein the core barrel above the core.

Thedrawing and description disclose what is now considered a preferred form of the invention by way of il ustration only it being obvious that mechanical changes and adaptations may be made in the mechanical strues ture of the implement, while thebroad pr1n c1 ple of the invention will be defined by the appended claims.

What I claim is:

1. A sample taking device including a drilling apparatus and a sample barrel therein which is removable while said apparatus is in the well bore, said drilling apparatus including a tubular stem and a drilling tool attached thereto and having an inlet passageway for a sample, said apparatus havin an outlet passageway for fluid above said mlet passageway, packing means around the barrel and in contact with the surrounding wall of the drilling apparatus, between the passageways forforming a substantiallyfluid tight seal between the barrel and drilling apparatus.

2. A sample taking device includlng a drilling apparatus and a sample barrel therein, said drilling apparatus including a tubular stem and a drilling tool attached thereto and having an inlet passageway into the barrel for the inlet of a sample, said apparatus having an outlet passageway for fluid above said inlet passageway and arranged to supply flushing fluid to said drilling tobl, up-

wardly opening cup rings about the barrel between said passageways and exposed to the pressure of said fluid and forming a fl'u1d tight joint between the barrel and drillmg apparatus.

3. A sample taking device including a drilling apparatus and a sample barrel therein, said drilling apparatus including a tubular stem and a drilling tool attached thereto and having an inlet passageway for a sample,

said apparatus having an outlet. passageway for fluid above said inlet passageway and arranged to supply flushing fluid to the drilling tool, means between the passageways and surrounding the sample barrel and ex posed to the pressure of said fluid for forming a seal between and in contact with both the barrel and drilling apparatus, said barrel and sealing means being bodily withdrawable from and-insertable into said drilling apparatus, while the latter is in a well bore.

4. Asample taking device including a drilling apparatus and a sample receiving barrel therein, said drilling apparatus comprising a tubular stem and a drilling tool attached to the lower end thereof, said tool having a sample inlet passageway aligned with the barrel, said apparatus having an inside seat for the barrel and an outlet passageway spaced above the seat, an upwardly opening cup ring about the barrel formed of ieldable material, and so located that it will orm a seal between said passageways when the barrel is seated in said apparatus.

5. A sample taking device including a drilling apparatus and a sample receiving barrel therein, said drilling apparatus comprising a tubular stem and a drilling tool attached there to and having a bore to admit a sample of the formation being drilled into said barrel, said drilling apparatus also including a cylinder having a seat for the barrel and said drilling apparatus having an outlet fluid passageway above said bore, said barrel including an external plunger like packing exposed to the pressure of the fluid flowing through said passageway and adapted to form a seal in the cylinder between said bore and passageway when the barrel is seated in the cylinder.

6. A sample-taking device including a drilling apparatus and a sample receiving barrel therein and removable therefrom.

while the apparatus is in a well bore, said drilling apparatus comprising a tubular stem and a drilling tool attached thereto and having an inlet to admit a sample of the formation being drilled into said barrel, said drilling apparatus also including a cylinder having a seat for the barrel and said drilling ap paratus having an outlet fluid passageway above said inlet, said barrel including an external plunger like packing formed of upi wardly opening cup rings adapted to form a seal in the cylinder between said inlet and passageway when the barrel is seated in the cylinder.

7. A sample taking device including a drilling apparatus and a sample barrel therein which is removable while said apparatus is in the well bore, said drilling apparatus including a tubular stem and a drilling tool attached thereto and having an inlet passageway for a sample, said apparatus having an outlet passageway for fluid above said inlet passageway, packing means around the barrel and in contact with the surrounding wall of the drilling apparatus between the passageways for formin' a substantially fluid tight seal between'theiarrel and drilling apparatus, and means through which said sample barrel may be lowered into and withdrawn from said drilling apparatus.

In testimony whereof I have signed my name to this specification.

SOSTHENE ROBICHAUX. 

